Quantum cloning machines for equatorial qubits
Abstract
Quantum cloning machines for equatorial qubits are studied. For the case of a one to two phase-covariant quantum cloning machine, we present the networks consisting of quantum gates to realize the quantum cloning transformations. The copied equatorial qubits are shown to be separable by using Peres-Horodecki criterion. The optimal one to M phase-covariant quantum cloning transformations are given.
- Publication:
-
Physical Review A
- Pub Date:
- December 2001
- DOI:
- arXiv:
- arXiv:quant-ph/0101101
- Bibcode:
- 2001PhRvA..65a2304F
- Keywords:
-
- 03.67.-a;
- 03.65.Ta;
- 89.70.+c;
- Quantum information;
- Foundations of quantum mechanics;
- measurement theory;
- Information theory and communication theory;
- Quantum Physics
- E-Print:
- Revtex, 9 pages